6666666660 has 96 divisors (see below), whose sum is σ = 21301365120. Its totient is φ = 1729724544.

The previous prime is 6666666647. The next prime is 6666666661. The reversal of 6666666660 is 666666666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6666666597 and 6666666606.

It is not an unprimeable number, because it can be changed into a prime (6666666661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146854 + ... + 186813.

It is an arithmetic number, because the mean of its divisors is an integer number (221889220).

Almost surely, 2^6666666660 is an apocalyptic number.

6666666660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6666666660 is an abundant number, since it is smaller than the sum of its proper divisors (14634698460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6666666660 is a wasteful number, since it uses less digits than its factorization.

6666666660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333722 (or 333714 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 54.

The square root of 6666666660 is about 81649.6580519478. The cubic root of 6666666660 is about 1882.0720571347.

It can be divided in two parts, 6 and 666666660, that added together give a palindrome (666666666).

The spelling of 6666666660 in words is "six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty".